So I have a hash:
test = {"_id"=>"5516c07ba520e0066c9ac53c", "accounts"=>[], "address"=>{"zip"=>"45245", "state"=>" Ohio", "city"=>"Cincinnati", "street"=>"3320 Wagner Road"}, "first_name"=>"Black", "last_name"=>"Bart"}
and I'm just playing around in the ruby console. To access the value at _id, I thought the command should just be test.[key] . But I run test.[_id] and I keep getting errors. This seems pretty simple, but I'm missing some syntax.
Firstly, there's no .
. Otherwise, you would have to access arrays like arr.[](0)
, add numbers like 1.+(2)
, etc. To make this more "natural," Ruby adds syntaxic sugar that removes the need for the .
when calling methods with certain names (such as []
, +
, etc.).
Secondly, you don't have a variable called _id
. You need to pass it as a string.
puts test["_id"]
您应该改用test["_id"]
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